Sticky pork belly bao buns

Name: Sticky pork belly bao buns
Ingredients: 1 tbsp sunflower oil; 800g piece boneless pork belly cut into thick slices; 4 tbsp light muscovado sugar; 3 garlic cloves sliced; thumb-sized piece ginger sliced; 2 star anise; 100ml Shaosing rice wine; 2 tbsp dark soy sauce; large pinch of Chinese five-spice powder; 250g plain flour plus extra for dusting; 1 tbsp white caster sugar; 1 tsp baking powder; 2 tsp fast-action dried yeast; 50ml milk; 1 tbsp sunflower oil plus extra for greasing; handful roasted peanuts; 1 tsp togarashi spice mix (see tip below); coriander leaves; cucumber batons; shredded spring onion